Morgan County, TN Insulation Payback
Is attic insulation worth it in Morgan County, TN?
DOE classifies Morgan County as climate zone 4, mixed-humid — real heating and real cooling seasons both, roughly balanced across the year. Its recommended attic R-value for bare joists is R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $1,311 a year in heating and cooling — a payback around 2.7 years. Few home upgrades pay back that quickly.
Heating vs. cooling in Morgan County
Heating accounts for about $1,153/year of that and cooling about $157/year — Morgan County needs both. Nationally, Morgan County ranks in the 39th percentile for insulation savings potential. Compared only against its own climate zone, Morgan County places 562nd out of 825. Against Tennessee's own average of $1,258/year, Morgan County runs 4% above that.
Where these numbers come from
NOAA's LANCING 6 NW, TN US station, 5 miles from Morgan County, supplies the 4,313 HDD and 980 CDD this estimate runs on. Combined heating and cooling load puts Morgan County in the 34th percentile of this 3,162-county dataset. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
If the attic isn't bare
If Morgan County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $191/year — payback about 11.9 years. Whether that is worth it depends on how long you plan to stay.
Next steps for a Morgan County attic
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Morgan County's estimated $1,311/year on the line.
Morgan County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Morgan County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.